Anthony, what build of version 12 did you experience this with?
I and my colleagues are seeing the same error ever since we applied the patch from v12.01 to v12.04. The admin console worked fine back in v12.1, and after installing v12.4 on 2013-07-08 it worked fine for several 9 days until we rebooted the machine. Subsequent to that we see the following error occurred every 2-3min starting 2013-07-17 at 5:04pm which corresponds to immediately following reboot from OS patching::
Log Name: Application
Source: FileMaker Server 12
Date: 7/17/2013 5:04:45 PM
Event ID: 701
Task Category: None
Admin Server process has terminated abnormally.
<Provider Name="FileMaker Server 12" />
<TimeCreated SystemTime="2013-07-18T00:04:45.000000000Z" />
Another anomoly with v12.4 is that it thinks it is v12.03. Restarting the FileMaker Server service logs to the C:\Program Files\FileMaker\FileMaker Server\Logs\event.log that v12.3 is installed:
2013-07-08 16:10:26.416 -0700 Information 162 ***redacted*** Starting FileMaker Server 12.0v3 x64 (09-20-2012)...
2013-07-08 16:10:26.650 -0700 Information 763 ***redacted*** Running on Microsoft Windows Server 2008 R2 x64 (6.1.7601, Service Pack 1), with 2 logical processor core(s)
1. Completely remove Java and FMS from the machine
2. Reinstall FMS and Java (FMS will install one version of Java during install)
I had Java 7 Update 17 (64-bit), and Java 7 Update 21 installed at the time when everything was working. If I were you, I would start by reinstalling/updating Java on your machine. If that doesn't work, I would try removing both Java and FMS; then install FMS, followed by Java.
Removing and reinstalling Java 7 Update 17 and Java 7 Update 21 separatly didn't work; that is what the FMS tech support rep tried. After the FMS tech support rep tried a few other things, they gave up and recommended reinstalling the OS!
Hope this helps,